diff --git a/transmit_disfection_protocol.hpp b/transmit_disfection_protocol.hpp
index 5178803..815220a 100644
--- a/transmit_disfection_protocol.hpp
+++ b/transmit_disfection_protocol.hpp
@@ -83,6 +83,13 @@ static inline const char* ProjectIDToString(uint32_t id) {
 }
 
 typedef enum {
+  kerr_noerror              = 0,
+  kerr_overtime             = 1,
+  kerr_invalid_param        = 2,
+  kerr_invalid_param_num    = 3,
+  kerr_subdevice_offline    = 4,
+  kerr_function_not_support = 5,
+  kerr_subdevice_overtime   = 6,
 
   // 驱动器错误
   kerr_motor_reset_error        = 100,